1<?php 2/** 3 * Copyright 2007-2017 Horde LLC (http://www.horde.org/) 4 * 5 * See the enclosed file COPYING for license information (LGPL). If you did 6 * not receive this file, see http://www.horde.org/licenses/lgpl21. 7 * 8 * @author Geoffrey T. Dairiki <dairiki@dairiki.org> 9 * @category Horde 10 * @license http://www.horde.org/licenses/lgpl21 LGPL-2.1 11 * @package Text_Diff 12 */ 13 14/** 15 * This can be used to compute things like case-insensitve diffs, or diffs 16 * which ignore changes in white-space. 17 * 18 * @author Geoffrey T. Dairiki <dairiki@dairiki.org> 19 * @category Horde 20 * @copyright 2007-2017 Horde LLC 21 * @license http://www.horde.org/licenses/lgpl21 LGPL-2.1 22 * @package Text_Diff 23 */ 24class Horde_Text_Diff_Mapped extends Horde_Text_Diff 25{ 26 /** 27 * Computes a diff between sequences of strings. 28 * 29 * @param string $engine Name of the diffing engine to use. 'auto' will 30 * automatically select the best. 31 * @param array $params Parameters to pass to the diffing engine: 32 * - Two arrays, each containing the lines from a 33 * file. 34 * - Two arrays with the same size as the first 35 * parameters. The elements are what is actually 36 * compared when computing the diff. 37 */ 38 public function __construct($engine, $params) 39 { 40 list($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) = $params; 41 assert(count($from_lines) == count($mapped_from_lines)); 42 assert(count($to_lines) == count($mapped_to_lines)); 43 44 parent::__construct($engine, array($mapped_from_lines, $mapped_to_lines)); 45 46 $xi = $yi = 0; 47 for ($i = 0; $i < count($this->_edits); $i++) { 48 $orig = &$this->_edits[$i]->orig; 49 if (is_array($orig)) { 50 $orig = array_slice($from_lines, $xi, count($orig)); 51 $xi += count($orig); 52 } 53 54 $final = &$this->_edits[$i]->final; 55 if (is_array($final)) { 56 $final = array_slice($to_lines, $yi, count($final)); 57 $yi += count($final); 58 } 59 } 60 } 61} 62
